Pit & Quarry, June 2016

EVOLUTION SERIES 1916 2 016 100 years Screening BY MEGAN SMALLEY Screening can be both an art and a science Like a piano or guitar used by a musical artist screening requires precise fine tuning to run efficiently And like a science calculations are made to determine the best way to achieve proper stratification of materials Over the years equipment manufacturers have tweaked the design of screening machines and offered new styles of screen media for a variety of applications The manufacturers and brand names have changed as well As we glance through 100 years of Pit Quarry we see the changes that have been made to screening technologies Pit Quarry showcases companies that offer screening 1929 equipment in its 1929 Handbook pictured above including the W S Tyler Co and Universal Vibrating Screen Co Each month in 2016 the Evolution Series will highlight industry advancements over the past 100 years as seen in the pages of Pit Quarry While its nothing like portable screening 1918 today portable screening in 1918 involves employing horse drawn carts to carry screens to different sites The innovation saves money at the time for a Kent County Mich company Pictured below is a flow sheet on how a 1936 screening plant works at Mason Walsh Atkinson Kier Co s sand and gravel operation in Grand Coulee Dam Wash The plant features 12 sizing screens feed and collecting conveyors and stone ladder chutes 50 PIT QUARRY June 2016 pitandquarry com

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